Screw.



- J. N. LEE,

sonfiwr APPLICATION FILED SEPT. 2, 1913.

' Patented Mar. 31, 1914,

UNITE STATES PATENT OFFICE.

JAMES N.:.I1EE, OF BRQQKLYN, NEW YORK ASSIG-NOR OF ONE-HALF TO .GRAMBERRY SUTTON, OF BROOKLYN, NEW-YORK.

To all wiiom it may. concern:

- Be it known that I, JAMES'N.-LEE, a can zen of the United States residingat Brooklyn, in the county of and State of New York, have invented certain new and useful Improyements .Screws, of which the following -is a specification, reference being had to the accompanying drawings.

This invention-relates to new'and useful improvements in screws orloolts and the like and the primary object of the invention re sides in providing a device of this character which is provided with means for abso= lutely preventing the removal thereof, after 4 ,ofthe screw"o1'-' bolt. 1,' when disposed in its 70 having once been positioned in the wood.

-A further object of the inventionresides in providing a screw or bolt with a, pivotedi 4 bladeat its. lower. end for lateral disposition after thescre'wor. bolt has'been' prop-1' erly inserted in the wood, whereby to'prevent the removal of said screw or bolt and a still further object resides in. providing means for o crating the blade.

Still anot er ob ect of the invention -re sides in providing a device which is simple and durable in construction, inexpensive to manufacture and one which will be very efii cient and useful in operation.

With these and other ob ects in view, the

invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter referred to and more particularly pointed out in the specification and claims.

In the accompanying drawing'formmg a part of this application, Figure 1 is an elevation of the device showing the blade disposed to its effective position. Fig 2 is a vertical section therethrough showing the blade in its inoperative position. Fig. 3 is a horizontal section through the same as seen on line 3-3, Fig. 2; Fig. -4.- is an elevation of the knife blade removed. Fig. 5 is a similar view of the punch used'in the operation of the device. Fig. 6 is a plan view of the bolt; and Fig. 7 is a bottom plan view of the punch used in the device.

In describing my invention, I shall refer to the drawingin which similar reference characters designate corresponding parts throughout the several views and in which- 1 indicates a vmetal screw or bolt, preferably the former, the head 2 of which is provided with the transverse slot 3 which is usually provided in screws. This screw or Specification of Letters Patent. Pat 'n 'n 19 a li aumimea'se mb r .7 I

bolt 1 isprovided with centralflongitudi nal bore 4, which communicates at its upper end with the '-slot 3 in the head and which communicates at its lower. end with a slot formed by bifurcating-the lpwerend of the bolt or screw 1, as shown-at 5. P votally. mounted on a 'pin-'6. extending transversely] through the :bifurcated and tapered lower end of "the. bolt or screw 1, I is' a substantially diamond shaped'blade '7,- the opposite edges'A and B of which are sharpened to provideknife edgesr fIhis' 1 blade 7 isoffsuch Isize asgto be entirely inclosed within, the slotin the lowermost end normalposition and. oneside edgethereof between'the kifeedgesEA and B, is ofiset'to= provide fa' shoulde'r 8] and a.- continuing 'bev-" eled or inclined edge" 9.-Ilthenormalpo- 4 sition offthis" blade 7 ,within the lower end '75 of the screwbr' bolt "1, thisbeveled-or'imclinededge tl leadingfrointhe shoulder 8 is disposed-upwardly and directed toward the .lower end ofithe 'bore4, the purpose ofwhich will be hereinafter and more articularl'y 80. described. In order to operatet 's blade 7, I have provided a rod 10 which is adapted to be disposed through .the longitudinal bore.

4 of the screw-or bolt 1, the lower end thereo'f being adapted to cohtact with: the incli'ned or beveled edge 9. of the blade to force the same somewhat laterally, whereby the cutting edges A and B may be disposed in opposite directions beyond the lower end of said bolt or-screw. In order to force this rod 10- downwardly against the blade, I have provided a punch which consists of a handle member or the like 11, the lower end of which is enlargedand provided with a stud or prong 12. This prong or stud 12 is adapted to be passed through the slot 3 of the head of the screw or bolt to engage with the upper end of said rod 10. When the hammer is applied to the upper end of the punch, it is obvious that the rod 10. may be forced downwardly to force the cutting edges A and B of the blade outwardly into v engagement'with the 'wood of an object in which this screw or bolt is applied.

In applying the device to use, the screw 0 or bolt 1, with the blade therein is first applied in the usual manner to an object, and the rodlO is .then applied in the bored thereof. The punch is then properly introduced into the head of the screw or bolt so that the 11 prong or stud- 12 engages the upper end of said rod, whereupon a hammer. is applied to the punch. As the rod is forced inwardly, the lower end of the same will contact with the inclined or beveled edge 9 of the blade 7. It is obvious that with such an engagement of the blade, the latter will be swung on' itspivot so that the cutting ed es A and 13 thereof willbe disposed .outwar y in opposite directions -to project be 'ond'the 'slot in the lower end of the screw or bolt 1. This bladewill cut its way-through the wood and thus securely hold the bolt or screw in the --desired position. The punch may than be removed and it will be seen. that the bolt "or' screw cannot be removed withoutsplittin .the'wood .in which the 4 same is dispose by the appended claims.

Havingthus described this invention, what is claimed is 2- 1. Ascrew' or bolt of the class described v.

comprising an elongated body having a central lon 'itudi'nal bore, the lower end of said bodybemg tapered and bi-fnrcated, the slot longitudinal bore,

. the upperjendof said bore,

verse axis in the bifurcated lower end forming the bifurcation communicating with the lower end of said bore, a head formed on-the body having a slot therein communicating with the upper end of said bore, a blade pivoted in the bifurcated lower end-of said, body, the one edge of said.

blade being ofiset to provide a shoulder and an inclined continuing edge, and .means adapted for: introduction throughthe boreof the body to engage the inclined edge and shoulder on the blade and swing the latter I on its pivot;

2. In a device of the class described, an

elongated threaded body. having a central the lower end of said body being tapered and bifurcated,'the slot formingthe eommunicationwith the lower endofsaid bore, a, head member formed-"on the bodfi havingga slot therein communicating wit a; substantially bifurcation being designed for diamond-shaped blade pivoted on a transsaidbody, one edge of saidblade being.

offset to provide a shoulder and an incline continuing edge, said shoulder and edge being normally directed upwardly toward the bore of the body, and means adaptedfor introduction through the bore of said-body ,to engage the inclined edge and shoulder on the blade and swing the same on its pivot.

In testimony whereofl hereunto affix my signature. in the presence of two witnesses.

I JAMES NFLEE.

Witnesses:

\V. R. FEREBEE,- AMY SITTEL.

Ooplu of this patent'may be obtained for five cents each, by addressing the Commissioner of ratents,

V walhingtonm. 0." 

